Thread-guide for textile-machines.



W. MARCROFT.

THREAD GUIDE FOR TEXTILE MACHINES.

APPLICATION FILED MAR. 23. 1915.

l ,29%,294. Patented Nov. 7, 1916.

PATN FEQ WILLIAM MARCROFT, OF CRANSTON, RHODE ISLAND, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO UNIVERSAL WINDING COMPANY, OF BOSTON, MASSACHUSETTS, A COR- PORATION OF MASSACHUSETTS.

THREAD-GUIDE FOR TEXTILE-MAGHINES ace-pea.

, Specification of Letters Patent.

Patented Nov. 7, 1916.

Application filed March 23, 1915. Serial No. 16,417.

To all whom it may concern Be it known that 1, WILLIAM MARoRorT, a citizen of the United States, residing at Cranston, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Thread-Guides for Textile-Machines, of which the following is a s )ecification.

My invention is an improved yarnor thread-guide for use on spinning-frames or twisting-machines The object of my improvement is to provide a thread-guide adapted to receive a plurality of separate strands or fibers delivered thereto in the form of a flat tape or ribbon and to gather them into closelyassociated, parallel relation preparatory to twisting them into the finished yarn or cord.

To this end my improved device consists essentially of a guiding-member or plate having a substantially flat face provided with a contracted yarn-receiving groove for confining and shaping the strands in their proper relation. At one end of the groove is an open ring-like gatherer or eye arranged to direct the several strands into the forming groove, from the opposite end of which they deliver to the flier or ring-spinning mechanism of the machine. By thus straightening and shaping the collection of associated strands in proper relation before they are twisted the individual strands are caused to lie more smoothly and evenly in parallelism, without slack places or kinks in the fibers, and for this reason the finished yarn is greatly improved in quality and appearance.

The manner and means for carrying out my improvement are fully described in the following specification, illustrated by the accompanying drawings, in which like reference characters designate like parts.

In the drawings: Figure 1 is a perspec-f. tive view of my improved thread-guide; Fig. 2 is a sectional view taken on the line XX of Fig. 1, looking in the directionl indicated by the arrow 00; and Fig. 3 is a view showing the invention applied to use in connection with a twisting-machine of conventional form.

Referring first to Fig. 3, are the delivery rolls which draw the separate strands or yarns off from their indiare of substantially the same construction and arrangement on all spinningand twist ing-frames. Usually the thread-board B has secured to its front side a series of hinged-plates P which carry wire pig-tails or guides 19 for the yarns drawing down from the delivery rolls R, etc. The pigtails p are generally fastened in place by screws pt engaging threaded holes in the plates P and my improved thread-guide can be applied to position on the plates P by means of these same screws. For this purpose I preferably form the thread-guide G with a foot or standard ,7 adapted to set down against the top of the wire pig-tail p, which is usually bent double in hairpinshape, see Fig. 1, and a slot 9 in the foot receives the screw 7/ to secure the parts together. As shown in Fig. 1, my improved guide is preferably formed of sheet-metal with an arc-shaped upright or face-plate g bent up from the foot g. If desired, however, the device might he made in two or more parts with the main guide-member constructed of porcelain or some other wearresisting material. The front face of the plate is scored with a longitudinal groove 9 preferably rounded on its bottom and of the proper width and depth to adapt it to confine the collection of strands or fibers in circular form as shown more particularly in Fig. 2. At its upper end the plate 9 is bent forward in a right-angled projection or bridge-piece 9* formed with a central opening or eye 9 having its inner edge lying tangent with the bottom of the groove 9 Leading into the eye 9 is a flaring opening or slot 9 adapted to direct the strands into place in threading them into the guide. R, R and R Below the bridge 9 the groove 9 is flared out to meet the sides of the eye 9', thus forming a funnel-like entrance 9 for the contracted portion of the groove. In applying my improved guide to the threadboard of the twistingor spinning-frame, the'slot g in its base allows for its adjustment inwardly or outwardly on the screw 19 so that the lower end of the thread-groove 9 can be set directly in line with the axis of the spindle E and the pig-tail p is then set to receive the yarns y as they emerge from the groove at this point. l

Having now described the structure and arrangement of my improved thread-guide in detail, its method of operation will next be explained: My new device is adapted for use in all varieties of twisting and spinning operations, and is of particular advantage when a relatively large number of strands are to be combined in the ultimate twisted yarn. For instance, in spinning or twisting strong, coarse yarns for automobile-tire fabrics, usually as many as eleven strands are twisted together to form the finished cord. Heretofore it has been found a difficult matter to deliver this large number of strands to the ring-traveler or fiier in smooth, even parallelism so that the yarns will lie evenly under the same tension in the twist. vVith my improved apparatus much greater uniformity of tension and smoothness of lay of the associated strands is secured and consequently a stronger and evener yarn is produced.

Referring particularly to Figs. 1 and 3, the web or mat of strands y, y, et'c., is carried through'the rolls R, R, R in fiat relation and thence brought down andthreaded through the guide-opening g in the eye 9 Frointhe eye 9 the strands pass through the funnel-like mouth g into the contracted groove and drawing down therethrough emerge at the bottom where they are guided and held from displacement by the pig-tail p. Thence they pass through the ring traveler d and are twisted into the finished yarn y which is wound onto the bobbin or spool S through the rotation of the latter as the traveler revolves about the spool and trav: erses up and down between'its ends. Here tofore, as before stated, only the pig-tail 79 has usually been employed to guide the yarns as they draw from the delivery-rolls to the traveler d,- but with the present arrangement the pig-tail is auxiliary to the main guide G and its purpose is to prevent the strands from whipping out of the guidegroove 9 Where only a pig-tail orbther encircling eye is' used -to encompass the strands "during the twisting operation their relation and the shape of their mass cannot be controlled to attain parallelism and even ness of the individual units-of the yarnl' My present improvement, as first explained, has for its object to provide a guide having a relatively long, narrow guidinggroove or channel which acts as a forming strain the loose strand will not bear its die to bring the separate strands into proper relation and to iron out the kinks and slack places so thatthey may all "be drawn'into the twist under substantially the same ten sion. In this way the ultimate twisted yarn will be formed with all of its strands lying smoothly and'evenly in place so that corkscrews or runners as they are sometimes termed will be entirely eliminated; The term runner is applied to a loose strand in the twisted yarn where it shows in a spi-v ral or corkscrew raised above the surface of the other strands and such defectsare often apparent cords'or yarns twisted in the usual manner. These runners, co-rk- 80 screws, kinks and other loose strands not only detract from the appearance of the fin ished yarn, but also impair its tensile strength since when the yarn is subjected to share of the tension and hence the whole cord is weakened. These defects are particularly serious in yarns intended for tirefabrics since they not only spoil the smoothness and evenness of the weave, but also detract from the strength of the fabric which is a most important consideration. WVith my improved guide the" separate strands are ironed out and smoothed into accurate parallelism during their passage through the forming-groove or die and their confinement in the groove also serves to clean them of any slivers,"motes, slubs or other foreign matter which might other wise pass into the twisted yarn. V 7

Various modifications might be made in the form and structure of niy improved device or in the manner of applying it to use without departing from the spirit or scope of the invention.

Therefore, without limiting myself to the 'exact embodiment herein shown and described, what I claimis z I V 1. An improved yarnor thread-guide for use on spinning, twisting or like machines 1 comprising a plate-like member bent longi tudinally into arcuate shape and formed use on spinning, twisting or likemachines comprising a longitudinally curved plate having a substantially flat face formed with a relatively narrow, shallow groove adapted to receive and 'confine a plurality' of asso-" 'ciated strands in parallel relation'and means to secure said plate in position on thethread} 12E 7 board of the machine. V a e 3. An improved yarnor thread-guide" comprising a foot-piece and a curved plate extending upwardly therefrom, with the convex face of said plate scored with a relatively narrow, shallow groove adapted to receive a plurality of associated strands drawing therethrough to straighten them out in close, parallel relation preparatory to twisting them into the finished yarn.

4. An improved yarnor thread-guide comprising a slotted foot and a curved plate extending upwardly therefrom, with the convex surface of the plate scored with a contracted groove adapted to receive a plurality of untwisted strands drawing therethrough and one end of said groove provided with a funnel-like mouth for directing the strands into the groove.

5. An improved yarn or thread-guide comprising a base member formed with an upwardly-extending arcuate plate bent at its top to provide a right-angled bridgepiece, said bridge-piece formed with an open thread-eye and a relatively narrow shallow groove extending from the eye longitudinally of the convex face of the plate to adapt it to receive a plurality of associated fibers drawing through the eye and across the plate.

In testimony whereof I aifix my signature in presence of two witnesses.

WVILLIAM MARCROFT.

WVitnesses GEORGE U. TAYLOR, ARTHUR A. ARMINGTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

